Nov. 28, 2016

Researchers at Fred Hutchinson Cancer Research Center in Seattle say chronic myeloid leukemia can be detected in dried blood samples, easing task of making diagnosis in poor countries. MORE

Sep. 20, 2016

Dr Jaume Padilla study in The American Journal of Physiology concludes fidgeting while seated benefits one's health by improving blood flow to legs. MORE

Aug. 2, 2016

Elizabeth Holmes, founder of embattled blood-testing company Theranos, discusses her company’s technology and data for first time in scientific meeting at annual American Assn for Clinical Chemistry in Philadelphia; says company is seeking approval of Zika virus detection test and introduces miniLab, box-sized table-top lab testing machine; presentation draws skepticism from laboratory specialists. MORE

Jul. 9, 2016

Federal regulators bar Theranos chief executive Elizabeth Holmes from owning or operating medical laboratory for at least two years following scrutiny over effectiveness of technology and way company operated its labs; unusually strict order raises new questions about future of troubled blood-testing start-up and Holmes. MORE

Jun. 13, 2016

Walgreens announces it will end relationship with Theranos, and will shut down 40 Theranos testing centers in its drugstores in Arizona; chain played critical role in rise of blood-testing company, which has since found itself under scrutiny. MORE

Apr. 25, 2016

Board members and investors in Theranos await announcement of management changes from founder and chief executive Elizabeth Holmes amid criminal investigation and persistent questions about whether core blood-testing technology works; insiders acknowledge that they have little leverage to effect change, underscoring peril of investing in firms where founder like Holmes exerts complete control. MORE

Apr. 22, 2016

James B Stewart Common Sense column observes Walgreens drugstore chain had planned to make besieged Theranos blood-testing wellness centers important part of its more than 8,000 stores; points out Walgreens is trying to end disastrous relationship with Theranos, which is under criminal investigation. MORE

Apr. 19, 2016

Beleaguered blood-testing company Theranos says Justice Dept and Securities and Exchange Commission are conducting criminal investigations into firm; growing number of federal and state officials are looking into company's technology claims. MORE

Apr. 14, 2016

Centers for Medicare and Medicaid Services may impose series of stiff sanctions against blood-testing firm Theranos; threatened penalties include closing down its main lab and barring chief executive Elizabeth Holmes from owning or operating labs for two years. MORE

Apr. 3, 2016

Op-Ed article by author Pagan Kennedy describes how engineer Ridhi Tariyal came up with idea of turning menstrual flow into medical samples, method for drawing blood that does not require needles; notes Tariyal was able to come up with solution largely because she is woman, and suggests case shows how innovation and inventions and patents have suffered due to lack of input from women scientists and engineers. MORE

Apr. 1, 2016

Centers for Medicare and Medicaid Services report says medical testing of blood samples performed by start-up Theranos was fraught with quality control problems that could have resulted in inaccurate patient results; laboratory could lose its federal certification if it does not correct problems identified in findings. MORE

Mar. 29, 2016

First independent assessment of finger blood tests from medical start-up Theranos is published in The Journal of Clinical Investigation, and researchers report tests produced more irregular results than conventional ones; study is likely to raise more doubts about company's testing method. MORE

Mar. 18, 2016

Food and Drug Administration is expected to hold workshop regarding accuracy of Alere’s blood-testing devices, INRatio and INRatio2; agency has received 9,000 reports of malfunctioning and 1,400 reports of injuries since products were approved for use in 2002. MORE

Feb. 23, 2016

Study in American Journal of Clinical Pathology finds different drops of blood from single subject can vary in terms of hemoglobin, white blood cell counts and platelet counts, and medical tests done with minimal amounts of blood may therefore be inaccurate. MORE

Feb. 3, 2016

Taking a daily low-dose aspirin has been shown to protect against dying from a Staphylococcus aureus blood infection. MORE

Dec. 20, 2015

Theranos founder and chief executive Elizabeth Holmes is attempting to rescue reputation of company and its blood testing technology; Food and Drug Administration is requiring equipment and tests to submit to regulatory process for approval; Holmes' challenge is to convince FDA and consumers of products' efficacy. MORE

Oct. 31, 2015

Medical equipment maker BD, which had battled in court with Theranos, maker of new blood-collecting nanotainer, over similarities to its 45-year-old microtainer, drops suit. MORE

Oct. 30, 2015

James B Stewart Common Sense column on Elizabeth Holmes, founder and chief executive of blood-testing start-up Theranos; without peer review, common practice in medicine, Theranos has raised more than $400 million in venture capital and has been valued at $9 billion; Theranos claims that its technology can provide same information as traditional blood draw with simple finger prick. MORE

Oct. 27, 2015

Theranos founder and chief executive Elizabeth Holmes, under criticism, says medical testing company will publish data confirming accuracy and reliability of its blood tests. MORE

Oct. 17, 2015

Blood testing start-up Theranos temporarily stops its trademark practice of collecting small blood samples from finger pricks; firm faces scrutiny by Food and Drug Administration over its data, as reliability of its test results have been questioned. MORE

Oct. 16, 2015

Patrick Girondi, founder of Errant Gene Therapeutics, is suing Memorial Sloan Kettering Cancer Center over rights to developing gene therapy that he hopes could cure his son of inherited blood disease called beta thalassemia, or Cooley's anemia; claims that Sloan Kettering is not moving therapy forward due to ties between Dr Craig B Thompson, center's president, and rival firm Bluebird Bio MORE

Jun. 5, 2015

Study published in journal Science reveals new test that can determine nearly every virus a subject has ever been exposed to from single drop of blood; test, still in experimental stage, can be performed for as little as $25 and could become powerful tool for tracking disease patterns. MORE

Apr. 20, 2015

New 'liquid biopsies' are showing great promise at detecting traces of cancer DNA in patients' blood; technology could allow oncologists to more quickly discover whether a treatment is working and to monitor for resistance, while sparing patients surgical biopsies and unnecessary procedures; method will require further evaluation before widespread implementation. MORE

Dec. 24, 2014

Food and Drug Administration says it will end decades-old lifetime prohibition on blood donation by gay and bisexual men, but will continue to not allow donations by men who have had sex with other men in the last year; ban was enacted in 1983, early in the AIDS epidemic, when testing was slower and less refined; men's health advocates welcome move as long overdue, but say stipulation still perpetuates discrimination and severely limits pool of donors. MORE

Dec. 17, 2014

Food and Drug Administration approves Intercept Blood System by Cerus, which could provide additional safety step beyond testing to ensure donated blood and plasma are not tainted by harmful viruses or bacteria; cautions system is not foolproof, but works well against HIV, hepatitis B and C, West Nile and many bacteria MORE

Nov. 28, 2014

Editorial calls for end to Food and Drug Administration rule barring homosexuals from donating blood; holds antiquated rule is holdover from days when HIV and AIDS were not fully understood; contends FDA should adopt policy that conforms with medical research. MORE

Nov. 6, 2014

Nancy Writebol, missionary who contracted Ebola in Liberia and recovered, donates her potentially life-saving blood plasma to Craig Spencer, doctor in New York who contracted disease in Guinea; some researchers believe that blood products or transfusions from Ebola survivors can provide antibodies against virus. MORE

Oct. 23, 2014

Critics say local officials and medical associations are often left to develop their own policies on how doctors’ offices, walk-in clinics and blood-testing centers should handle possible Ebola cases. MORE

Oct. 4, 2014

World Health Organization issues guidance on how to collect blood of people sickened by Ebola virus but who have since recovered, in effort to access antibodies that might help others fight off infection; treatment is not considered foolproof and there are many logistical problems in carrying this out in West Africa. MORE

Sep. 29, 2014

In a small study, researchers found that certain activity in patients’ immune systems correlated to different recovery times. MORE

Aug. 23, 2014

Medical advances that have eliminated the need for millions of blood transfusions are wreaking havoc in the blood bank business, forcing unprecedented wave of mergers and job cutbacks; American Red Cross notes transfusions are down almost one-third over past five years, largely due to the rise of minimally invasive surgeries; industry revenue is falling, and decline could reach $1.5 billion by the end of 2014. MORE

May. 19, 2014

In heart surgery, a patient’s own red blood cells may be a better choice than blood transfusion. MORE

May. 5, 2014

Pair of studies published in journals Science and Nature Medicine show that blood from young mice reverses aging in old mice, rejuvenating their muscles and brains; experts say research could lead to treatments for illnesses like Alzheimer's disease and heart disease. MORE

Apr. 27, 2014

Brooks Haxton Lives essay confesses that his son's online poker playing habit baffles him; compares his son's gambling to the chance he and his wife took when his son was a baby and needed a total exchange transfusion of blood, but which they rejected in favor of a partial transfusion. MORE

Apr. 8, 2014

Simple blood tests called 'liquid biopsies' for people with cancer or suspected cancer are starting to replace uncomfortable and somewhat risky biopsies; blood tests are praised as less invasive than traditional biopsies, but their usefulness is being questioned as they may be less accurate. MORE

Mar. 11, 2013

Some research suggests that changes in stored blood, which currently can be kept up to 42 days, may be harmful to patients. MORE

Feb. 12, 2013

Science Q&A on whether thickness or viscosity of blood affects one's sensitivity to temperature and climate. MORE

Nov. 3, 2012

Anticlotting drug Pradaxa is growing in popularity for its ease of use, but has been associated with hemorrhaging and has no antidote to reverse its blood-thinning effects; Pradaxa has been linked to more than 500 bleeding deaths in its two years on the market; drug has become a blockbuster for its maker Boehringer Ingelheim, bringing in more than $1 billion in sales. MORE

Mar. 21, 2012

Hospitals in the United States have been slow to adopt the blood-clotting drug tranexamic acid, even though a study found it could save up to 4,000 American lives each year; cheap generic drug generates very little profit, so companies that make it do not champion it. MORE

Mar. 18, 2012

Lisa Sanders Diagnosis column describes a man with unusual symptoms who was ultimately diagnosed with acute intermittent porphyria, a disease that results from problems in making an essential component of red blood cells. MORE

Nov. 22, 2011

Ian Roberts of the London School of Hygiene and Tropical Medicine commissions Youtube video to demonstrate life-saving potential of tranexamic acid, cheap generic drug that has been demonstrated to be extremely effective in clotting blood in trauma victims; 90 percent of trauma deaths are in poor or middle-income countries, where drug is not yet widely used. MORE

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